1128635843 has 4 divisors (see below), whose sum is σ = 1128786048. Its totient is φ = 1128485640.

The previous prime is 1128635821. The next prime is 1128635873. The reversal of 1128635843 is 3485368211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1128635843 - 2⁶ = 1128635779 is a prime.

It is a super-2 number, since 2×1128635843² = 2547637732208641298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1128635843.

It is not an unprimeable number, because it can be changed into a prime (1128635873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63203 + ... + 79068.

It is an arithmetic number, because the mean of its divisors is an integer number (282196512).

Almost surely, 2^1128635843 is an apocalyptic number.

1128635843 is a deficient number, since it is larger than the sum of its proper divisors (150205).

1128635843 is an equidigital number, since it uses as much as digits as its factorization.

1128635843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150204.

The product of its digits is 138240, while the sum is 41.

The square root of 1128635843 is about 33595.1758888088. The cubic root of 1128635843 is about 1041.1611301092.

The spelling of 1128635843 in words is "one billion, one hundred twenty-eight million, six hundred thirty-five thousand, eight hundred forty-three".